Centrifugal filter.



No. 718,858. f PATBNTBD JAN. 20, 1903. G. MOORE. GENTRIFUGAL FILTER.

APPLICATION FILED MAR. l2, 1902.

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wventoz @Noruego PATBNTED JAN. 20, 1903.

No. 718,858. y

' G. MOORE. r GENTRIFUGAL FILTER.

APPLIoATIoN FILED un. 12, 1902.

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GEORGE MOORE, OF SALT LAKE OlTY, UTAH.

CENTRIFUGAL FILTER.

SPECIFIGATEON forming part of' :Letters atent No. 718,858, dated January20, 1903.

Application filed March 12,1902. Serial No. 97,904. (No model.)

To @ZZ 1072/0112, zit' may concern:

Be it known that 1, GEORGE MOORE, a citizen of the United States,residing at Salt Lake City, in the county of Salt Lake and State ofUtah, have invented certain new and useful Improvements in CentrifugalFilters; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to improvements in filters, and more particularlyto the rotary type depending upon centrifugal force for its action.

The object in view is 'the separation of solids from liquids by havingthe mass delivered upon the surface of a revolving drum, means beingprovided for separating said substances through the centrifugal actioncaused by the rotation of said drum.

ith this and other objects in view the invention consists, incombination with suitable supporting means, of a revolubly mounted drumthereon, a filtering medium lining the walls of said drum, means fordelivering the material to be filtered against said filtering medium,and means for revolving said drum.

it also consists of certain other novel constructions, combinations, andarrangements of parts, as will be hereinafterfully described andclaimed.

In the accompanying drawings, Figure 1 represents a longitudinalvertical central section through a filter embodying the features of thepresent invention. Fig. 2 represents a transverse horizontal sectiontaken on the plane of line 2 2 of Fig. 1. Fig. 3 represents enlargeddetail side and ed ge views of the camwheel.

Referring to the drawings by numerals, 1 indicates any suitablesupporting-framework carrying a shaft 2, journaled therein, said shaft 2slidably engaging a shaft 3 and keyed or otherwise secured thereto so asto rotate the same with its rotation. A suitable pulley or othergearing, as 4, is preferably fixed to shaft 2 for rotating the same,motion being received from any desired source of power.

The lower end of shaft 3 is stepped in a cross-head 5, being preferablysupported directly upon a suitable ball-bearing, as 6, said guides 7,secured in the framework 1. Beneath cross-head 5 is transverselyarranged a shaft, as 8, to which is keyed or otherwise fixedly secured acam-wheel, as 9, designed to have its periphery constantly in contactwith and supporting cross-head 5. Any suitable means (not shown) may beemployed for rotating shaft 8, and it will be readily apparent that suchmovement thereof, through the medium of cam-wheel 9, will impart ajarring action to shaft 3 for purposes hereinafter mentioned. Near theupper end of shaft 3 is a plate 10, secured to the framework 1, and nearthe lower end thereof is a similar plate, as 11, similarly secured, andsuitable collars, as 12 and 13, are secured to shaft 3 for engagingtheir respective plates for limiting the longitudinal movement of saidshaft.

Surrounding shaft 3 and rigidly secured thereto by any preferred numberof spiders, as 14 14, is a drum, as 15, preferably in the form of atruncated cone and encircled by a suitable strengthening band, as 15.Arranged longitudinally of the inner surface of drum 15 arecorrugat-ions or flutes 16 16, of any preferred depth and number, andsecured in any preferred manner to the inner face of drum 15, insidecorrugations A16, is a suitable filtering medium, as a screen or cloth17. The preferred manner of securing filtering medium 17 is by clampingthe same at each end of drum 15 by means of bands 18 and 19. Alsosecured to shaft 3, near the upper end of drum 15 and within the same,is a suitable (preferablyconical) spreader-apron, as 20, designed toreceive the material fed to the present filter from the pipe or othersource of supply 21.

An annular trough, as 22, is iixedly supported in framework 1 andsurrounds the lower end of drum 15, said drum being provided with aseries of apertures, as 23, communicating with corrugations 1G and lyingwithin the horizontal plane of trough 22, whereby in operationcentrifugal action will tend to throw the liquid moving down said.corrugations through said apertures and into trough 22. Any suitabledrain, as 24, may be provided for removing the filtered liquor fromvtrough 22. Rigidly attached to or made integral with trough 22 is anannular dependcross-head being arranged to slide in suitable ingupwardly-flaring collar, as 25, for pur- ICO poses hereinafterdescribed. A tube, as 26, extends within the lower end of drum 15 forsupplying wash-water, a suitable joint, as 27, being provided in thelength of the same for permitting adjustment of the spray from the tube,the upper end of the tube normally being directed toward the filteringmedium 17. Any suitable hopper, as 28, is preferably arranged beneaththe collar 25.

In operation the shaft 3, with its drum 15 and spreader 20, beingrevolved and at the same time subjected to the jarring action ofcam-wheel 9, the solution to be filtered is fed upon said spreaderthrough supply 2l and is thrown by centrifugal force against thefiltering medium 17, the liquid thereof being caused to penetrate saidmedium by the same force which delivered it, so that the solids are lefton the outer surface of said filtering medium, while the liquids passthrough and run down corrugations 16 to apertures 23, where they aredirected by centrifugal action into trough 22 and may then be removed asdesired. The solids meanwhile are caused to graduallydescend through thejarring action continually given drum 15 until they are fiung againstcollar 25 and thence drop into hopper 28, from which they may be removedin any preferred manner. Just before the solids reach the end of drum 15the spray from pipe 26 strikes them and washes therefrom every trace ofthe originally-contained liquor.

Among the many advantages of the present invention will be apparent thefact that a continuous feeding and filtering action may be maintainedand the further fact that the solids are subjected to the filteringaction (centrifugal force having a tendency to draw as much of thematerial as possible through medium 17) throughout the entire length ofthe drum.

Although I have described the present filter as having the drum with itsshafts arranged in a vertical plane, it will be apparent that the samemay be altered to a horizontal or other plane and that many other slightchanges in the details of structure may be made fully within the spiritand scope of the present invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. In a mechanism of the class described, the combination with asuitable framework, of a truncated, conical drum revolubly mountedtherein, and having its inner surface corrugated, the corrugationsextending so as to direct the filtered solution` from the top toward thebottom of the drum, a filtering medium lining the said inner surface,means for revolving said drum, and means for delivering a solution to befiltered into contact with said filtering medium, substantially asdescribed.

2. In a mechanism of the class described,

the combination with a suitable framework, of a shaft revolubly mountedtherein, means for rotating said shaft, a rotating lifting meansengaging the lower end of the shaft for moving it longitudinally, a drumcarried by and surrounding said shaft, a filtering medium carried bysaid drum, means for rotating said shaft and drum, and means fordelivering the solution to be ltered to the filtering medium duringrotation of said drum, substantially as described.

3. Afilter, comprising arevolubly-mounted drum, formed with longitudinalflutes in its inner surface, a filtering medium lining said innersurface but leaving the flutes open, means for revolving said drum, andmeans for supplying a solution to be filtered to said filtering mediumduring rotation of the drum, substantially as described.

4. A filter, comprising a suitable drum provided with longitudinalflutes in its inner surface and apertures formed in the walls of saiddrum, communicating with said fiutes, near the lower ends thereof, anannular trough surrounding the lower end of said drum in the horizontalplane of said apertures, and a filtering medium designed to receive thesolution to be filtered during rotation of the drum, whereby the solidswill be retained on the outer surface of said filtering medium, whilethe liquids will penetrate the same, pass down the flutes and out saidapertures into said annular trough, substantially as described.

5. In a mechanism of the class described, the combination with asuitable framework, of a revolubly-mounted drum therein, means forrotating said drum, means for imparting a longitudinal jarring action tosaid drum, means arranged longitudinally of said drum for filteringliquids supplied thereto, a fixed trough surrounding thev lower end ofsaid drum, ay fixed collar also surrounding said lower end, and meansfor directing the liquids of the solution filtered into said trough andthe solids of said solution against said collar, substantially asdescribed.

6. In a mechanism of the class described, the combination with asuitable framework, of a shaft mounted therein, means for rotating saidshaft, a cross-head slidably mounted in suitable guides in saidframework, said shaft being stepped in said cross-head, means for movingsaid cross-head in said guides, whereby a longitudinal jarring actionwill be given said shaft, a filtering means arranged longitudinally ofsaid shaft designed to have its filtering action perfected through thejarring motion of said shaft, substantially as described.

7. In a mechanism of the class described, the combination with asuitable framework, of a longitudinal movable shaft mounted therein,means for rotating said shaft, a camwheelsupporting uponits peripherythe lower end of the shaft and designed to impart a jarring longitudinalmovement thereto, a fil- IOO IIO

tering-drum surrounding and secured to said shaft, and means fordelivering the liquids to be filtered to said drum during rotationthereof, substantially as described.

8. A filtering mechanism, comprising a rotating, conical-shapedfiltering means,a series of apertures being formed therein near itslower edge, an annular trough arranged outside said none-shapedfiltering means and formed with an inwardly-inclined outer wall, thesaid outer wall being higher than its inner wall and the said inner wailhaving its upper edge just below the said apertures, adownwardly-extending projection on the said inner wall forming adownwardly-converging collar for directing solid materials below theltering means, and means for rotating the

